/ Dictionary / Index O Ona: Meaning and Definition of Find definitions for: O•na Pronunciation: (ō'nu), [key] — pl. O•nas, O•na a member of a people of Tierra del Fuego. a female given name. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. on on-again, off-again Related Content Daily Word Quiz: rustic Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language